The present invention pertains to a BIOS debug method, which adds an error output command at a proper position in each sub-routine of a power on self test and inserts a condition before the error output command so that only when the condition holds will the error output command be compiled and executed. The price bounds may be read directly from a price bound database or computed from antecedent data such as wholesale prices stored in the price bound database. , compounds which evidence acetylcholinesterase inhibition activity, and 5-HT3 receptor antagonist activity. This power source may power an adjacent charger that charges a battery. The locking member may also include at least one rib or protrusion.